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author | Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> | 2023-07-17 16:15:02 +0300 |
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committer | Shuah Khan <skhan@linuxfoundation.org> | 2023-07-25 17:53:42 +0300 |
commit | f4123975cf341fd12121e1631c4b172a190f48d4 (patch) | |
tree | a3496cee68794018e93c2b86a10133721e7eae4d /tools/testing/selftests | |
parent | 5e3e4f1a03f075bd49104ea4c998c20649a49491 (diff) | |
download | linux-f4123975cf341fd12121e1631c4b172a190f48d4.tar.xz |
selftests/resctrl: Improve parameter consistency in fill_buf
fill_buf's arguments can be improved in multiple ways:
- Multiple functions in fill_buf have start_ptr as one of their
argument which is a bit long and the extra "start" is pretty
obvious when it comes to pointers.
- Some of the functions take end_ptr and others size_t to indicate
the end of the buffer.
- Some arguments meaning buffer size are called just 's'
- mem_flush() takes void * but immediately converts it to char *
Cleanup the parameters to make things simpler and more consistent:
- Rename start_ptr to simply buf as it's shorter.
- Replace end_ptr and s parameters with buf_size and only calculate
end_ptr in the functions that truly use it.
- Make mem_flush() parameters to follow the same convention as the
other functions in fill_buf.
- convert mem_flush() char * to unsigned char *.
While at it, fix also a typo in a comment.
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Tested-by: Shaopeng Tan (Fujitsu) <tan.shaopeng@fujitsu.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Diffstat (limited to 'tools/testing/selftests')
-rw-r--r-- | tools/testing/selftests/resctrl/fill_buf.c | 49 |
1 files changed, 24 insertions, 25 deletions
diff --git a/tools/testing/selftests/resctrl/fill_buf.c b/tools/testing/selftests/resctrl/fill_buf.c index a5ec9c82a960..5f16c4f5dfbf 100644 --- a/tools/testing/selftests/resctrl/fill_buf.c +++ b/tools/testing/selftests/resctrl/fill_buf.c @@ -38,32 +38,32 @@ static void cl_flush(void *p) #endif } -static void mem_flush(void *p, size_t s) +static void mem_flush(unsigned char *buf, size_t buf_size) { - char *cp = (char *)p; + unsigned char *cp = buf; size_t i = 0; - s = s / CL_SIZE; /* mem size in cache llines */ + buf_size = buf_size / CL_SIZE; /* mem size in cache lines */ - for (i = 0; i < s; i++) + for (i = 0; i < buf_size; i++) cl_flush(&cp[i * CL_SIZE]); sb(); } -static void *malloc_and_init_memory(size_t s) +static void *malloc_and_init_memory(size_t buf_size) { void *p = NULL; uint64_t *p64; size_t s64; int ret; - ret = posix_memalign(&p, PAGE_SIZE, s); + ret = posix_memalign(&p, PAGE_SIZE, buf_size); if (ret < 0) return NULL; p64 = (uint64_t *)p; - s64 = s / sizeof(uint64_t); + s64 = buf_size / sizeof(uint64_t); while (s64 > 0) { *p64 = (uint64_t)rand(); @@ -74,12 +74,13 @@ static void *malloc_and_init_memory(size_t s) return p; } -static int fill_one_span_read(unsigned char *start_ptr, unsigned char *end_ptr) +static int fill_one_span_read(unsigned char *buf, size_t buf_size) { + unsigned char *end_ptr = buf + buf_size; unsigned char sum, *p; sum = 0; - p = start_ptr; + p = buf; while (p < end_ptr) { sum += *p; p += (CL_SIZE / 2); @@ -88,26 +89,26 @@ static int fill_one_span_read(unsigned char *start_ptr, unsigned char *end_ptr) return sum; } -static -void fill_one_span_write(unsigned char *start_ptr, unsigned char *end_ptr) +static void fill_one_span_write(unsigned char *buf, size_t buf_size) { + unsigned char *end_ptr = buf + buf_size; unsigned char *p; - p = start_ptr; + p = buf; while (p < end_ptr) { *p = '1'; p += (CL_SIZE / 2); } } -static int fill_cache_read(unsigned char *start_ptr, unsigned char *end_ptr, +static int fill_cache_read(unsigned char *buf, size_t buf_size, char *resctrl_val) { int ret = 0; FILE *fp; while (1) { - ret = fill_one_span_read(start_ptr, end_ptr); + ret = fill_one_span_read(buf, buf_size); if (!strncmp(resctrl_val, CAT_STR, sizeof(CAT_STR))) break; } @@ -124,11 +125,11 @@ static int fill_cache_read(unsigned char *start_ptr, unsigned char *end_ptr, return 0; } -static int fill_cache_write(unsigned char *start_ptr, unsigned char *end_ptr, +static int fill_cache_write(unsigned char *buf, size_t buf_size, char *resctrl_val) { while (1) { - fill_one_span_write(start_ptr, end_ptr); + fill_one_span_write(buf, buf_size); if (!strncmp(resctrl_val, CAT_STR, sizeof(CAT_STR))) break; } @@ -138,25 +139,23 @@ static int fill_cache_write(unsigned char *start_ptr, unsigned char *end_ptr, static int fill_cache(size_t buf_size, int memflush, int op, char *resctrl_val) { - unsigned char *start_ptr, *end_ptr; + unsigned char *buf; int ret; - start_ptr = malloc_and_init_memory(buf_size); - if (!start_ptr) + buf = malloc_and_init_memory(buf_size); + if (!buf) return -1; - end_ptr = start_ptr + buf_size; - /* Flush the memory before using to avoid "cache hot pages" effect */ if (memflush) - mem_flush(start_ptr, buf_size); + mem_flush(buf, buf_size); if (op == 0) - ret = fill_cache_read(start_ptr, end_ptr, resctrl_val); + ret = fill_cache_read(buf, buf_size, resctrl_val); else - ret = fill_cache_write(start_ptr, end_ptr, resctrl_val); + ret = fill_cache_write(buf, buf_size, resctrl_val); - free(start_ptr); + free(buf); if (ret) { printf("\n Error in fill cache read/write...\n"); |